--  @testpoint:opengauss关键字trailing(保留)，作为函数名

--关键字不带引号-失败
drop function if exists trailing;
create function trailing(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/

--关键字带双引号-成功
drop function if exists "trailing";
create function "trailing"(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
drop function "trailing";

--关键字带单引号-合理报错
drop function if exists 'trailing';
create function 'trailing'(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
--关键字带反引号-合理报错
drop function if exists `trailing`;
create function `trailing`(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/